Bicycle chain adaptive to 9-11 speeds
By optimizing the shape design of the ball bearings, pins, and inner and outer chain plates of the bicycle chain, the strength and compatibility issues of the bicycle chain in the 9-11 speed range have been solved, achieving stable chain operation and efficient gear shifting.
Patent Information
- Application Number
- CN202520286074.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Existing bicycle chains struggle to balance strength and compatibility with 9-11 speed chains, and are particularly prone to issues such as abnormal noise, chain slippage, and jamming when paired with various freewheels.
By improving the shape and size of the ball bearings, pins, and inner and outer chain plates, a bicycle chain suitable for 9-11 speeds is designed. The structure of the inner and outer chain plates is optimized to increase strength and improve the fit with the freewheel, preventing chain slippage and jamming.
It achieves stable operation of the bicycle chain within the 9-11 speed range, avoiding abnormal noise, chain drop, and jamming, and ensuring the chain's strength and compatibility.
Smart Images
Figure CN223751064U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of chain transmission technology, in particular to a bicycle chain suitable for 9-11 speeds. BACKGROUND
[0002] With the development of the bicycle field, especially the mid-motor electric-assisted bicycle, the power is getting larger and larger, and the strength requirement of the bicycle chain is getting higher and higher; in addition, in the field of bicycle accessories such as bicycle freewheel, more and more manufacturers begin to integrate their products, such as integrating 9-11 speeds to make their costs lower and lower to ensure their position in the market, which makes the bicycle chain manufacturers not only consider the strength when designing, but also consider the compatibility with various freewheels when designing; but in the case of steel limit, like motorcycle and industrial chain, thickening or enlarging the chain plate is not feasible in most cases on high-speed bicycle chain, because the freewheel manufacturers will design the spacing between the freewheels and the shape of the chain guide groove to the limit to ensure the smoothness and response speed of the gear shifting, which makes the thickened and enlarged bicycle chain have abnormal noise, chain drop and jamming and other adverse conditions; under such conditions, E-Bike manufacturers begin to focus on the development of rear-motor vehicles, which undoubtedly goes against the original intention of E-Bike development. In summary, the existing bicycle chain cannot guarantee the strength and compatibility with 9-11 speed chain. CONTENT OF THE INVENTION
[0003] The present application discloses a bicycle chain suitable for 9-11 speeds, which aims to solve the strength problem and ensure the compatibility of the chain.
[0004] In order to achieve the above purpose, the technical scheme of the present application is as follows:
[0005] A bicycle chain suitable for 9-11 speeds, comprising a chain body, the chain body comprising alternatingly connected inner links and outer links, the inner link comprising an inner chain plate and a roller, the two first chain plate hole port edges of the inner chain plate being coaxially provided with outwardly protruding annular ribs, the two inner chain plates being oppositely arranged and the annular ribs of the two inner chain plates being oppositely arranged one by one, and the rollers being gap-fitted on the oppositely arranged annular ribs one by one; the outer link comprising an outer chain plate and a pin shaft, the outer chain plate being provided with two second chain plate holes, the two outer chain plates being oppositely arranged, the second chain plate holes of the two outer chain plates being oppositely arranged one by one, and the pin shaft penetrating through the second chain plate holes oppositely arranged one by one, the two ends of the pin shaft being respectively in interference fit with the corresponding second chain plate holes, and the pin shaft penetrating through the two first chain plate holes of the adjacent inner link and being gap-fitted with the first chain plate holes.
[0006] Preferably, the inner chain plates are provided with two, including inner chain plate one and inner chain plate two, the upper end of the first chain plate hole of the inner chain plate one is provided with an annular convex edge, the lower end of the first chain plate hole of the inner chain plate two is provided with an annular convex edge, and the inner chain plate one and the inner chain plate two are oppositely arranged in the inner chain link.
[0007] Preferably, the left and right ends of the inner chain plate are straight line segments parallel to the middle axis in the front-back direction of the inner chain plate, the top end of the inner chain plate is recessed inward to form a first thinning area, the first thinning area penetrates the front and rear ends of the inner chain plate, the rear end of the inner chain plate is a curved segment with a small curvature and is recessed inward, first arc segments are connected between the left and right ends of the curved segment and the top ends of the corresponding straight line segments, and the front end of the inner chain plate is an arc segment recessed inward, second arc segments are connected between the left and right ends of the arc segment and the front ends of the corresponding straight line segments.
[0008] Preferably, the radius of curvature of the curved segment 3 is 65-120 mm.
[0009] Preferably, the thickness of the first thinning area is 0.7-0.72 mm.
[0010] Preferably, the outer chain plate is an "8" shaped chain plate, the outer chain plate is symmetrically arranged about the middle axis in the left-right direction and the middle axis in the front-back direction, and on this basis, the upper edges of the circular arc structures on both sides of the front end of the outer chain plate are chamfered.
[0011] Preferably, the thickness of the outer chain plate is 0.88-0.9 mm.
[0012] Preferably, the top middle part of the outer chain plate is recessed downward to form a second thinning area, the second thinning area penetrates the front and rear ends of the outer chain plate, and the thickness of the second thinning area is 0.8-0.82 mm.
[0013] Preferably, the height of the pin shaft is 5.65-5.7 mm.
[0014] Preferably, the diameter of the ball in the freewheel adapted to the bicycle chain is 1.95-2.00 mm.
[0015] The new bicycle chain adapted to 9-11 speeds has the following advantages:
[0016] The new bicycle chain adapted to 9-11 speeds improves the shape and size of the ball, the pin shaft, and the inner and outer chain plates, so that the chain body is compatible with 9-speed, 10-speed, and 11-speed. Practice has proved that the chain body has sufficient strength, and the rear derailleur position does not jump the chain. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the present application, the drawings used in the embodiments required below are briefly introduced, and constitute a part of the specification, together with the embodiments of the present application, for explaining the present application, and do not constitute a limitation on the present application.
[0018] Figure 1 The chain body structure diagram of the present application;
[0019] Figure 2 The top view structure diagram of the inner chain plate of the present application;
[0020] Figure 3 The front view structure diagram of the inner chain plate of the present application;
[0021] Figure 4 The top view structure diagram of the outer chain plate of the present application;
[0022] Figure 5 The front view structure diagram of the outer chain plate of the present application.
[0023] 01, outer chain plate; 02, inner chain plate; 03, roller; 1, first thinning area; 2, inner chain plate bottom; 3, curved segment; 4, first arc segment; 5, arc segment; 6, straight segment; 7, second arc segment; 8, inner chain plate front-rear direction center axis; 9, third arc segment; 10, fourth arc segment; 11, outer chain plate rear end concave arc segment; 12, outer chain plate front-rear direction center axis; 13, second thinning area; 14, outer chain plate bottom; 15, outer chain plate front end concave arc segment; 16, chamfer contour; 17, outer chain plate left-right direction center axis; 18, pin shaft upper end; 19, pin shaft lower end; 20, annular convex rib. DETAILED DESCRIPTION
[0024] The technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0025] The following embodiments can be understood as explaining the partial structure of the present application individually, or as explaining the larger range of structure of the present application through the combination of multiple embodiments.
[0026] Embodiment 1
[0027] A bicycle chain suitable for 9-11 speed, such as Figure 1As shown, including chain body, the chain body includes alternatingly connected inner link and outer link, the inner link includes inner chain plate 02, roller 03, the two first chain plate hole port edges of the inner chain plate 02 are coaxially provided with outwardly protruding annular ribs 20, two inner chain plates 02 are oppositely arranged and the annular ribs 20 of the two inner chain plates 02 are oppositely arranged, and the roller 03 is gap-fitted on the oppositely arranged annular ribs 20; the outer link includes outer chain plate 01, pin shaft, the outer chain plate 01 is provided with two second chain plate holes, two outer chain plates 01 are oppositely arranged, the second chain plate holes of the two outer chain plates 01 are oppositely arranged, the pin shaft is penetrated through the oppositely arranged second chain plate holes, and the two ends of the pin shaft are respectively in interference fit with the corresponding second chain plate holes, the pin shaft is penetrated through the two first chain plate holes of adjacent inner links and is gap-fitted with the first chain plate hole.
[0028] Embodiment 2
[0029] As shown in Figure 1 , 2 , 3, the inner chain plate is provided with two kinds, including inner chain plate one and inner chain plate two, the upper end port edge of the first chain plate hole of the inner chain plate one is provided with annular rib 20, the lower end port edge of the first chain plate hole of the inner chain plate two is provided with annular rib 20, and the inner chain plate one and the inner chain plate two are oppositely arranged in the inner link.
[0030] Embodiment 3
[0031] As shown in Figure 2 , 3 , the left and right ends of the inner chain plate 02 are straight line segments 6 parallel to the central axis 8 of the front and back directions of the inner chain plate, the top end of the inner chain plate 02 is inwardly recessed to form a first thinning area 1, the first thinning area 1 penetrates through the front and back ends of the inner chain plate 02, the rear end of the inner chain plate 02 is a curve segment 3 with small curvature and inwardly recessed, the left and right ends of the curve segment 3 are connected with the top end of the corresponding straight line segment 6 through a first arc segment 4, and the front end of the inner chain plate 02 is an arc segment 5 inwardly recessed, and the left and right ends of the arc segment 5 are connected with the front end of the corresponding straight line segment 6 through a second arc segment 7.
[0032] Embodiment 4
[0033] As shown in Figure 3 , the radius of curvature of the curve segment 3 is 65mm-120mm.
[0034] As shown in Figure 3 , the thickness of the first thinning area is 0.7-0.72mm.
[0035] Embodiment 5
[0036] As shown in Figure 4 , 5As shown, the outer chain plate 01 is an "8" shaped chain plate, the outer chain plate 01 is symmetrically arranged about the left-right direction and the front-back direction, on this basis, the upper edge of the arc structure on both sides of the front end of the outer chain plate is chamfered, see Figure 4 The chamfered structure can make the bicycle more stable when shifting, reducing the probability of failure to guide.
[0037] As shown in Figure 5 The thickness of the outer chain plate 01 is 0.88-0.9mm, which is thicker than the conventional bicycle chain thickness, increasing the strength of the chain.
[0038] Example 6
[0039] As shown in Figure 5 The upper end of the outer chain plate 01 is recessed to form a second thinning area 13, which extends through the front and rear ends of the outer chain plate 01, the thickness of the second thinning area 13 is 0.8-0.82mm, the setting of the second thinning area can prevent the chain from falling when the front sprocket is shifted.
[0040] Example 7
[0041] As shown in Figure 1 The height of the pin shaft is 5.65-5.7mm.
[0042] Example 8
[0043] As shown in Figure 1 The diameter of the ball in the sprocket of the bicycle chain is 1.95-2.00mm, which can prevent the chain from jumping teeth during operation.
[0044] The working principle of the new type:
[0045] On the basis of the conventional bicycle chain, the shape and size of the ball, pin shaft and inner and outer chain plate are improved, so that the chain body realizes compatibility with 9-speed, 10-speed and 11-speed, and practice proves that the chain body has sufficient strength and the rear derailleur position does not jump chain.
Claims
1. A bicycle chain adapted for 9-11 speeds, characterized in that: The chain body comprises alternatingly connected inner links and outer links, the inner link comprises an inner chain plate and a roller, two first chain plate hole port edges of the inner chain plate are coaxially provided with outwardly protruding annular ribs, two inner chain plates are oppositely arranged and the annular ribs of the two inner chain plates are opposite to each other, and the rollers are gap-fitted on the opposite annular ribs; the outer link comprises an outer chain plate and a pin shaft, the outer chain plate is provided with two second chain plate holes, two outer chain plates are oppositely arranged, the second chain plate holes of the two outer chain plates are opposite to each other, the pin shaft penetrates through the two first chain plate holes of the adjacent inner link and is gap-fitted with the first chain plate hole.
2. A 9-11 speed bicycle chain as claimed in claim 1, characterized in that: The inner chain plate is provided with two types, i.e., an inner chain plate one and an inner chain plate two, the upper end port edge of the first chain plate hole of the inner chain plate one is provided with an annular rib, the lower end port edge of the first chain plate hole of the inner chain plate two is provided with an annular rib, and the inner chain plate one and the inner chain plate two are oppositely arranged in the inner link.
3. A 9-11 speed bicycle chain as claimed in claim 2, characterized in that: The left and right ends of the inner chain plate are straight line segments parallel to the central axis in the front-rear direction of the inner chain plate, the top middle part of the inner chain plate is inwardly recessed to form a first thinning area, the first thinning area penetrates through the front and rear ends of the inner chain plate, the rear end of the inner chain plate is a curve segment with a small curvature and inwardly recessed, the left and right ends of the curve segment are connected with the top ends of the corresponding straight line segments through a first arc segment, and the front end of the inner chain plate is an arc segment inwardly recessed, the left and right ends of the arc segment are connected with the front ends of the corresponding straight line segments through a second arc segment.
4. A 9-11 speed bicycle chain as claimed in claim 3, characterised in that: The curvature radius of the curve segment 3 is 65-120 mm.
5. A 9-11 speed bicycle chain as claimed in claim 4, characterised in that: The thickness of the first thinning area is 0.7-0.72 mm.
6. A 9-11 speed bicycle chain as claimed in claim 5, characterised in that: The outer chain plate is an "8" shaped chain plate, the outer chain plate is symmetrically arranged about the central axis in the left-right direction and the central axis in the front-rear direction, and on this basis, the upper edges of the arc structures on both sides of the front end of the outer chain plate are chamfered.
7. A 9-11 speed bicycle chain as claimed in claim 6, characterised in that: The thickness of the outer chain plate is 0.88-0.9 mm.
8. A 9-11 speed bicycle chain as claimed in claim 7, characterised in that: The top middle part of the outer chain plate is downwardly recessed to form a second thinning area, the second thinning area penetrates through the front and rear ends of the outer chain plate, and the thickness of the second thinning area is 0.8-0.82 mm.
9. A 9-11 speed bicycle chain as claimed in claim 8, characterised in that: The height of the pin shaft is 5.65-5.7 mm.
10. A 9-11 speed bicycle chain as claimed in claim 9, characterised in that: The diameter of the ball in the bicycle chain adapted flywheel is 1.95-2.00 mm.